Air purification unit
USD316142S · kind S · design
5Cited by
1References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1989 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Apr 9, 2005 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.